Beliefs About Cues to Deception: Mindless Stereotypes or Untapped Wisdom?

In this longitudinal study, senders told truths and lies to same-sex friends (judges) at both one month and six months into the relationship. Judges guessed whether the stories were truths or lies, and described the cues they used to make their decisions. These cues were coded into categories according to the nature of the cue (verbal, visual, or paralinguistic). Judges mentioned more verbal cues when the story was truthful than when it was fabricated, and mentioned more visual nonverbal cues when it was fabricated than when it was truthful. Therefore, perceivers' stated beliefs about cues discriminated the truths from the lies, although their explicit judgments of deceptiveness did not. Perceivers who mentioned visual or verbal cues more often were not more accurate at detecting deception (explicitly), but those who mentioned paralinguistic cues more often were more accurate.     

Existence of Equilibrium in Single and Double Private Value Auctions1

We show existence of equilibria in distributional strategies for a wide class of private value auctions, including the first general existence result for double auctions. The set of equilibria is invariant to the tie‐breaking rule. The model incorporates multiple unit demands, all standard pricing rules, reserve prices, entry costs, and stochastic demand and supply. Valuations can be correlated and asymmetrically distributed. For double auctions, we show further that at least one equilibrium involves a positive volume of trade. The existence proof establishes new connections among existence techniques for discontinuous Bayesian games.     

Cursed Equilibrium

There is evidence that people do not fully take into account how other people's actions depend on these other people's information. This paper defines and applies a new equilibrium concept in games with private information, cursed equilibrium, which assumes that each player correctly predicts the distribution of other players' actions, but underestimates the degree to which these actions are correlated with other players' information. We apply the concept to common‐values auctions, where cursed equilibrium captures the widely observed phenomenon of the winner's curse, and to bilateral trade, where cursedness predicts trade in adverse‐selections settings for which conventional analysis predicts no trade. We also apply cursed equilibrium to voting and signalling models. We test a single‐parameter variant of our model that embeds Bayesian Nash equilibrium as a special case and find that parameter values that correspond to cursedness fit a broad range of experimental datasets better than the parameter value that corresponds to Bayesian Nash equilibrium.     

Social Constructs and Human Service: Managerial Sensemaking of Volunteer Motivation

Managers of volunteers in human service interpret their job and experiences through a cognitive construct grounded in past interactions and experiences. This construct—sensemaking—then guides the managers' perceptions of subsequent interactions with peers, volunteers, and supervisors. Volunteers similarly make sense of their surroundings through cognitive constructions grounded in their own experiences. Unfortunately, managers and volunteers do not always make sense of their surroundings in the same way. Research has demonstrated that supervisors and paid employees may not necessarily agree in their perceptions of such issues as, for example, employee motivation. Such differences can lead to disagreements about the meaning of behaviors and the design of reward systems, eventually compromising organizational performance. In this study, sensemaking of volunteer motivation was assessed from the manager's perspective and compared with a previous study of volunteers themselves. Differences in understanding such a primary question as why volunteers are present can reasonably be expected to have an impact on organizational effectiveness. Interestingly, the predicted outcome of a different sensemaking schema was not supported in either the understanding of motivation or in the relative importance assigned to altruism. Additional attributes of volunteer managers were also considered to determine if sensemaking is driven by environmental factors such as exposure to volunteers, tenure as a volunteer manager, or social roles associated with gender constructs. These additional attributes were not found to significantly affect the process of attribution of altruistic motives.     

Overcoming Incentive Constraints by Linking Decisions1

Consider a Bayesian collective decision problem in which the preferences of agents are private information. We provide a general demonstration that the utility costs associated with incentive constraints become negligible when the decision problem is linked with a large number of independent copies of itself. This is established by defining a mechanism in which agents must budget their representations of preferences so that the frequency of preferences across problems mirrors the underlying distribution of preferences, and then arguing that agents' incentives are to satisfy their budget by being as truthful as possible. We also show that all equilibria of the linking mechanisms converge to the target utility levels. The mechanisms do not require transferable utility or interpersonal comparisons of utility, and are immune to manipulations by coalitions.     

Offending,Substance Use,and Cohabitation in Young Adulthood1

Over half of young adults have cohabited, but relatively little is known about the role delinquency and substance use play in youths’ odds of cohabiting as well as the implications of cohabitation for early adult offending and substance use. This study focuses on the reciprocal relationship between cohabitation during late adolescence and young adulthood and self‐reported offending and substance use. Using longitudinal data, we find that net of traditional predictors, delinquency involvement is associated with increased odds of cohabitation and cohabiting at younger ages while substance use is not related to cohabiting during early adulthood. Further analysis indicates that cohabitation is associated with lower reports of substance use. However, cohabitation is not associated with self‐reported offending. The results help unravel the connection between cohabitation experience, offending and substance use, and early adult outcomes.     

‘Doing Something Positive’: Volunteers’ Experiences of the Well-Being Benefits Derived from Practical Conservation Activities in Nature

There is a strong tradition in Britain of volunteering involving a wide range of activities and organisations. Increasingly volunteering is seen as a way of benefiting health and building sustainable communities. In a study in 2007 we aimed to address the research questions: what are the motivations for, barriers to, and benefits of formal practical environmental volunteering for those individuals involved? Qualitative and quantitative data collection was undertaken while spending a day each with ten volunteer groups as they undertook their practical conservation activities. In this paper we focus primarily on the physical, mental and social well-being benefits that volunteers derived from their activities. Our research involved 88 people volunteering regularly in a range of places from scenic natural landscapes to urban green spaces in northern England and southern Scotland. Respondents described a range of benefits they gained from their involvement including improved fitness, keeping alert, meeting others and reducing stress levels. We suggest that practical environmental volunteering has flexibility in the types of activity available and the time scale in which activities are undertaken and therefore can provide a range of physical, social and mental well-being benefits to people with very differing abilities and from different socio-economic backgrounds.     

The Characteristics of Romantic Relationships Associated with Teen Dating Violence

Studies of teen dating violence have focused heavily on family and peer influences, but little research has been conducted on the relationship contexts within which violence occurs. The present study explores specific features of adolescent romantic relationships associated with the perpetration of physical violence. Relying on personal interviews with a sample of 956 adolescents, results indicate that respondents who self-report violence perpetration are significantly more likely than their non-violent counterparts to report higher levels of other problematic relationship dynamics and behaviors such as jealousy, verbal conflict, and cheating. However, we find no significant differences in levels of love, intimate self-disclosure, or perceived partner caring, and violent relationships are, on average, characterized by longer duration, more frequent contact, sexual intimacy and higher scores on the provision and receipt of instrumental support. Finally, violence is associated with the perception of a relatively less favorable power balance, particularly among male respondents. These findings complicate traditional views of the dynamics within violent relationships, add to our understanding of risk factors, and may also shed light on why some adolescents remain in physically abusive relationships.     

Computing continuous core/periphery structures for social relations data with MINRES/SVD

When diagonal values are missing or excluded, MINRES is a natural continuous model for the core/periphery structure of a symmetric social network matrix. Symmetric models, however, are not so useful when dealing with asymmetric data. Singular value decomposition (SVD) is a natural choice to model asymmetry, but this method also requires the presence of diagonal values. In this paper we offer an alternative, more general, approach to continuous core/periphery structures, the minimum residual singular value decomposition (MINRES/SVD), where each node in the network receives two indices, an “in-coreness” and an “out-coreness.” The algorithm for computing these coreness vectors is a least squares computation similar to, but distinct from the SVD, again because of the missing diagonal values. And in contrast to the standard, symmetric MINRES algorithm, we can more accurately model asymmetric matrices. This allows us to distinguish, for example, countries in the world economy that are more in the exporting core than they are in the importing core. We propose two nested PRE (proportional reduction of error) measures of fit: (1) the PRE from the MINRES vector with respect to the data and (2) the PRE of the product of the two MINRES/SVD vectors. Applying the resulting method to citations between journals and to international trade in clothing, we illustrate insights gained from being able to model asymmetrical flow patterns. Finally, two permutation tests are introduced to test independently for the MINRES and MINRES/SVD results.